Tom,
I'd suggest doing a dedicated TBI (2 hole BBC size) intake with a mount pad for the MAP/IAT sensor. This way all the connections except for the tach and +12 for the injectors are in 1 place. Makes the wiring easier.
Even the 350 TBI (junkyard) are plenty big to feed a healthy 292.
End users would see a marked increase in fuel economy.
I like this idea.
I ran a single barrel Holley Projection on top of a Clifford several years ago but was not very happy with it despite fiddling around for a while. Not sure why. Maybe because it is open loop (no O2 feedback) or maybe the Clifford was too big or too cold, I don't know. I understand that a wet manifold can be more difficult than a dry one but still, I like the TBI concept.